IEC_60335-2-70.pdf

INTERNATIONALSTANDARDIEC60335-2-70Second edition2002-03Household and similar electrical appliances Safety Part 2-70:Particular requirements for milking machinesAppareils lectrodomestiques et analogues Scurit Partie 2-70:Rgles particulires pour les machines traireReference numberIEC 60335-2-70:2002(E)Publication numberingAs from 1 January 1997 all IEC publications are issued with a designation in the60000 series.For example,IEC 34-1 is now referred to as IEC 60034-1.Consolidated editionsThe IEC is now publishing consolidated versions of its publications.For example,edition numbers 1.0,1.1 and 1.2 refer,respectively,to the base publication,thebase publication incorporating amendment 1 and the base publication incorporatingamendments 1 and 2.Further information on IEC publicationsThe technical content of IEC publications is kept under constant review by the IEC,thus ensuring that the content reflects current technology.Information relating tothis publication,including its validity,is available in the IEC Catalogue ofpublications(see below)in addition to new editions,amendments and corrigenda.Information on the subjects under consideration and work in progress undertakenby the technical committee which has prepared this publication,as well as the listof publications issued,is also available from the following:IEC Web Site(www.iec.ch)Catalogue of IEC publicationsThe on-line catalogue on the IEC web site(www.iec.ch/catlg-e.htm)enablesyou to search by a variety of criteria including text searches,technicalcommittees and date of publication.On-line information is also available onrecently issued publications,withdrawn and replaced publications,as well ascorrigenda.IEC Just PublishedThis summary of recently issued publications(www.iec.ch/JP.htm)is alsoavailable by email.Please contact the Customer Service Centre(see below)forfurther information.Customer Service CentreIf you have any questions regarding this publication or need further assistance,please contact the Customer Service Centre:Email:custserviec.chTel:+41 22 919 02 11Fax:+41 22 919 03 00INTERNATIONALSTANDARDIEC60335-2-70Second edition2002-03Household and similar electrical appliances Safety Part 2-70:Particular requirements for milking machinesAppareils lectrodomestiques et analogues Scurit Partie 2-70:Rgles particulires pour les machines traire IEC 2002 Copyright-all rights reservedNo part of this publication may be reproduced or utilized in any form or by any means,electronic ormechanical,including photocopying and microfilm,without permission in writing from the publisher.International Electrotechnical Commission,3,rue de Varemb,PO Box 131,CH-1211 Geneva 20,SwitzerlandTelephone:+41 22 919 02 11 Telefax:+41 22 919 03 00 E-mail:inmailiec.ch Web:www.iec.chJFor price,see current cataloguePRICE CODECommission Electrotechnique InternationaleInternational Electrotechnical Commission 2 60335-2-70 IEC:2002(E)CONTENTSFOREWORD.4INTRODUCTION.61Scope.72Normative references.73Definitions.74General requirement.85General conditions for the tests.86Classification.87Marking and instructions.98Protection against access to live parts.109Starting of motor-operated appliances.1010Power input and current.1011Heating.1012Void.1013Leakage current and electric strength at operating temperature.1014Transient overvoltages.1015Moisture resistance.1016Leakage current and electric strength.1117Overload protection of transformers and associated circuits.1118Endurance.1119Abnormal operation.1120Stability and mechanical hazards.1121Mechanical strength.1122Construction.1223Internal wiring.1224Components.1225Supply connection and external flexible cords.1226Terminals for external conductors.1227Provision for earthing.1228Screws and connections.1329Clearances,creepage distances and solid insulation.1330Resistance to heat and fire.1331Resistance to rusting.1332Radiation,toxicity and similar hazards.13Annexes.14Annex AA(informative)Examples of milking machines.14Bibliography.1860335-2-70 IEC:2002(E)3 Figure AA.1 Example of a bucket or direct-to-can milking machine.14Figure AA.2 Example of a pipeline milking machine.15Figure AA.3 Example of a recorder milking machine.16Figure AA.4 Example of an independent air and milk transport milking machine.17 4 60335-2-70 IEC:2002(E)INTERNATIONAL ELECTROTECHNICAL COMMISSION_HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES SAFETY Part 2-70:Particular requirements for milking machinesFOREWORD1)The IEC(International Electrotechnical Commission)is a worldwide organization for standardizationcomprising all national electrotechnical committees(IEC National Committees).The object of the IEC is topromote international co-operation on all questions concerning standardization in the electrical and electronicfields.To this end and in addition to other activities,the IEC publishes International Standards.Theirpreparation is entrusted to technical committees;any IEC National Committee interested in the subject dealtwith may participate in this preparatory work.Internation